EK-ED2-TP EK-E12-TP · 2020. 12. 4. · For final use, this unit must be completed with frontal plates for commands and a frame, which must be ordered ... EK-E12-TP-RW (red-white

Application manual Wall mounting KNX Pushbuttons

with Thermostat EK-ED2-TP 2-4 rockers Series ‘FF EK-E12-TP 1-4 rockers Series ’71

Application manual

KNX pushbutton interfaces with thermostat EK-ED2-TP/ EK-E12-TP

Revision 2.2.0 - Updated: 04/12/2020 MAEKED212TP_EN

© EKINEX S.p.A. – All rights reserved Pag. 2

Summary

1 Scope of the document .................................................................................................................................. 5 2 Product description ........................................................................................................................................ 6

2.1 Completion of the device ....................................................................................................................... 6 2.2 Rocker functions .................................................................................................................................... 9 2.3 LED indicators ........................................................................................................................................ 9 2.4 Customization of rocker plates .............................................................................................................. 9

3 Switching, display and connection elements ............................................................................................... 10 4 Configuration ............................................................................................................................................... 12 5 Commissioning ............................................................................................................................................ 12 6 Function description .................................................................................................................................... 13

6.1 Offline operation ................................................................................................................................... 13 6.2 Online operation ................................................................................................................................... 13 6.3 Software working cycle ........................................................................................................................ 14 6.4 Pushbutton inputs ................................................................................................................................ 14

6.4.1 Pushbutton input events ............................................................................................................... 14 6.4.2 Lock function ................................................................................................................................ 14 6.4.3 State variables (communication objects) ..................................................................................... 14 6.4.4 Binding between Events and Communication objects ................................................................. 15 6.4.5 Repeated send ............................................................................................................................. 15 6.4.6 Input coupling ............................................................................................................................... 15 6.4.7 Single or independent input mode ............................................................................................... 16 6.4.8 Coupled input mode ..................................................................................................................... 16 6.4.9 Dimming function ......................................................................................................................... 18 6.4.10 Shutter / venetian blind function ................................................................................................... 20

6.5 LED indicators ...................................................................................................................................... 23

6.5.1 General parameters ..................................................................................................................... 23 6.5.2 Individual parameters ................................................................................................................... 23 6.5.3 Technical Alarm indicator ............................................................................................................. 23

6.6 Temperature sensor ............................................................................................................................. 24

6.6.1 Temperature sensor ..................................................................................................................... 24

6.7 Room thermostat ................................................................................................................................. 25

6.7.1 Use of sensors ............................................................................................................................. 25 6.7.2 Applications .................................................................................................................................. 25 6.7.3 Control algorithms ........................................................................................................................ 25

6.7.3.1 Two-point control with hysteresis .............................................................................. 26 6.7.3.2 Continuous Proportional-Integral control .................................................................. 27 6.7.3.3 PWM Proportional-Integral control ............................................................................ 29

6.7.4 Setpoint management .................................................................................................................. 30 6.7.5 Operating modes .......................................................................................................................... 31 6.7.6 Heating/cooling switch over ......................................................................................................... 32 6.7.7 Window switch management ....................................................................................................... 33 6.7.8 Valve protection function .............................................................................................................. 33 6.7.9 Temperature control alarm ........................................................................................................... 33

6.8 Logic functions ..................................................................................................................................... 35

Application manual




7 Application program for ETS ....................................................................................................................... 38

7.1 About EK-ED2-TP and EK-E12-TP ..................................................................................................... 39 7.2 General settings ................................................................................................................................... 40 7.3 Internal sensors ................................................................................................................................... 45

7.3.1 Temperature sensor ..................................................................................................................... 45

7.4 Rockers configuration .......................................................................................................................... 47

7.4.1 Independent or single: send values or sequences....................................................................... 48 7.4.2 Independent or single: dimming ................................................................................................... 48 7.4.3 Independent or single: shutter or venetian blind .......................................................................... 49 7.4.4 Independent or single: scene ....................................................................................................... 49 7.4.5 Coupled: switch ............................................................................................................................ 50 7.4.6 Coupled: dimming ........................................................................................................................ 50 7.4.7 Coupled: shutter or venetian blind ............................................................................................... 50

7.5 Rocker x: Function A/B configuration .................................................................................................. 50

7.5.1 Independent or single ................................................................................................................... 50 7.5.2 Independent or single: Lock function enabled ............................................................................. 52 7.5.3 Independent or single: send values or sequences....................................................................... 53 7.5.4 Independent or single: dimming ................................................................................................... 56 7.5.5 Independent or single: shutter or venetian blind .......................................................................... 57 7.5.6 Independent or single: scene ....................................................................................................... 58 7.5.7 Coupled ........................................................................................................................................ 59 7.5.8 Coupled: Lock function enabled ................................................................................................... 59 7.5.9 Coupled: switch ............................................................................................................................ 59 7.5.10 Coupled: dimming ........................................................................................................................ 60 7.5.11 Coupled: shutter or venetian blind ............................................................................................... 61

7.6 LED configuration ................................................................................................................................ 62 7.7 Temperature control ............................................................................................................................. 64

7.7.1 Settings ........................................................................................................................................ 64 7.7.2 Monitoring and remote control of the conduction mode ............................................................... 66 7.7.3 Remote operative mode modification .......................................................................................... 67 7.7.4 Remote Setpoint modification ...................................................................................................... 68 7.7.5 Sensors from bus ......................................................................................................................... 69 7.7.6 Weighted temperature value ........................................................................................................ 70 7.7.7 Heating ......................................................................................................................................... 71 7.7.8 Cooling ......................................................................................................................................... 73

7.8 Logic functions ..................................................................................................................................... 76

7.8.1 Parameter and communication object tables ............................................................................... 76

8 Appendix ...................................................................................................................................................... 78

8.1 Summary of KNX communication objects ........................................................................................... 78 8.2 Warning ................................................................................................................................................ 81 8.3 Other information ................................................................................................................................. 81

Application manual




Revision Modifications Date

2.2.0 ED2 image updated to 2020 version 04/12/2020

2.1.0 Deleted all references to light sensor 09/03/2020

2.0.0 Updating of the internal temperature controller with related structure of c.o. database. 16/05/2017

1.1.0 Updating of the c.o. indexes in internal database. 30/01/2017

1.0.4 Adding of cross reference to the versions with BG (blue-green) and RW (red-white) LED 04/09/2015

1.0.3 Adding of logic functions. In the 4 rectuangular rockers configuration, it was reintroduced the possibility to control each rocker as a unique rocker, with function A in parallel to function B.

28/08/2015

1.0.2 Updating of temperature control, continuous regulator. 04/08/2015

1.0.1 First emission. 04/05/2015

Application manual




1 Scope of the document

This application manual describes application details for ekinex® pushbutton interface EK-ED2-TP (2-4

rockers) and for ekinex® pushbutton interface EK-E12-TP (1-4 rockers).

The document is aimed at the system configurator as a description and reference of device features and

application programming. For installation, mechanical and electrical details of the device please refer to the

technical description datasheet.

Application manual and application programs for ETS are available for download at www.ekinex.com.

Item File name (## = release) Version Device rel. Update

Product datasheet STEKED32TP_EN.pdf EK-ED2-TP

A2.0 12 / 2020 Application manual MAEKED12TP_EN.pdf EK-ED2-TP

Application program APEKED2TP##.knxprod EK-ED2-TP

Item File name (## = release) Version Device rel. Update

Product datasheet STEKE122TP_EN .pdf EK-E12-TP

A2.0 12 / 2020 Application manual MAEKED12TP_EN.pdf EK-E12-TP

Application program APEKE12TP##.knxprod EK-E12-TP

You can access the most up-to-date version of the full documentation for the device using following QR codes:

2-4 rocker interface EK-ED2-TP:

1-4 rocker interface EK-E12-TP:

Application manual




2 Product description

The ekinex® KNX 4-rocker pushbutton unit is a wall-mounting device for on/off switching of loads, dimming of

lighting devices, control of motor drives or other programmable switching and control functions. The pushbutton

is equipped with an integrated temperature sensor and can act as a room probe or thermostat, both in heating

and cooling mode. When acting as a room thermostat, the device is not equipped with a user interface for

displaying room conditions and modifying the setpoint temperature; therefore, it must be paired with an external

supervision device. Terminals such as radiators, electrical radiators and radiant panels can be controlled.

This unit is equipped with an integrated KNX bus communication module and is designed for wall installation;

commands are constituted by rockers with 2 active plus a neutral rest position. The device has also two

programmable LEDs for each function which can be used for instance as a status signal or orientation

nightlight.

For final use, this unit must be completed with frontal plates for commands and a frame, which must be ordered

separately in order to obtain the desired aesthetic look; regardless of the detail, several kinds of plates are

available (square or rectangular) which can be combined in order to obtain different rockers’ combinations.

The device is powered by the KNX bus line with a 30 VDC SELV voltage and does not require auxiliary power.

Product code Number and type of

rockers Rocker size Frame

EK-ED2-TP (blue-green led couples)

EK-ED2-TP-RW (red-white led couples) 2 rectangular vertical

4 square

4 rectangular horizontal

40 x 80 mm

40 x 80 mm

80 x 20 mm

Form or Flank series

EK-ED2-TP-BG-NF (no frame line, blue-green led couples)

EK-ED2-TP-RW-NF (no frame line, red-white led couples)

No frame

Product code Number and type of

rockers Rocker size Frame

EK-E12-TP (blue-green led couples)

EK-E12-TP-RW (red-white led couples) 1 single square

2 rectangular vertical

4 square

4 rectangular horizontal

60x60 mm

30x60 mm

30x30 mm

15x60 mm

Form or Flank series

EK-E12-TP-BG-NF (no frame line, blue-green led couples)

EK-E12-TP-RW-NF (no frame line, red-white led couples)

No frame

The supply includes, inside the box:

1 adapter;

1 metallic support;

2 pairs of fixing screws;

1 KNX terminal block for the connection of the bus line.

2.1 Completion of the device

For full installation and operation, the unit must be completed with:

A rocker faceplate (according to the chosen number and disposition);

Application manual




An ekinex® Form or Flank series 1-place square or 2-place rectangular frame (with the exception of

the rocker interfaces of No Frame series NF);

An ekinex® 1-window square or 2-window rectangular plate

Rocker placement for EK-ED2-TP

Combining the 3 available models of rockers (rectangular vertical, square horizontal and rectangular

horizontal) different configurations are allowed, as shown in the following picture.

Figure 1A - Rocker combination for EK-ED2-TP

Application manual




Rocker placement for EK-E12-TP

Combining the 4 available models of rockers (square single, rectangular vertical, square horizontal and

rectangular horizontal) different configurations are allowed, as shown in the following picture.

Figure 2B - Rocker combination for EK-E12-TP

Application manual




2.2 Rocker functions

Each one of two active positions of the rockers (side for rectangular rockers, superior and inferior for square

ones) corresponds to an action, i.e. an input, or physical pushbutton, of the device. Such actions, in relation to

a single rocker, will be labelled with letters A and B.

When one side of a rocker is pressed, the device sends on the KNX bus the telegram (or sequence) associated

to the corresponding function according to how the device is programmed.

In the most common situation, for instance, one side of the rocker might send an “ON” telegram for a lighting

unit, while the other side would send the “OFF” telegram for the same unit. Another typical application would

be for one side of the rocker to increase the brightness of a dimmed light (and respectively decrease it for the

opposite side), or to raise / lower a curtain or blind and so on.

The two functions associated with a rocker can also be programmed to perform exactly the same operation,

thereby effectively causing one rocker to act as a single pushbutton.

Note for EK-ED2-TP

The use of the entire activation surface of the rocker as if it is a single rocker is programmed by

defining the function B as “in parallel with function A as a single function”. This use is configurable

only in combinations a), b) and c) (see Figure 1 in the previous page): for instance, it is possible to

link only one function to combination a) with a single square rocker.

In combination d) with 4 rectangular horizontal rockers it is possible to link only functions other than

function A and function B.

2.3 LED indicators

Each one of the 2 rocker sides is equipped with 4 high efficiency couple of LEDs with different color

combinations blue/green and red/white, which can be freely programmed (also with functions not related to

the rockers’ functions) e.g. as status feedbacks of the loads or as orientation nightlight.

For a more detailed description of LED position and related settings please refer to the application section of

this manual.

2.4 Customization of rocker plates

Rocker plates can be customized with predefined symbols and texts. On request, a customization is also

possible with symbols and texts chosen by the customer. For more information see the standard library on the

ekinex® catalogue or the website www.ekinex.com.

For further technical information, please also refer to the product datasheet available on the

website www.ekinex.com.

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3 Switching, display and connection elements

The front side of the device is fitted with mounting hooks for the rocker faceplates; between the hooks there

are the pushbuttons and on the lateral sides the LEDs for status indication are placed.

On the rear side, the device is equipped with a programming pushbutton, a programming status LED and

terminals for connecting the KNX bus line.

Fig. 2A - Switching, display and connection elements for EK-ED2-TP

1) Connection terminal block for KNX bus line

2) Product label

3) Adapter

4) Rocker (in the example: 30 x 30 mm square type)

5) LED-lightguide

6) Positioning of the temperature sensor

7) Programming pushbutton

8) Programming LED

Application manual




Fig. 2B- Switching, display and connection elements for EK-E12-TP

1. Rocker faceplate hooks

2. LED diffusers

3. Temperature sensor

4. Programming pushbutton

5. Programming LED

6. Terminal block for KNX bus line

7. Adapter

Application manual




4 Configuration

The exact functionality of the device depends on the software settings.

In order to configure and commission the device you need ETS4 or later releases and the ekinex® application

program, (namely APEKED2TPxx.knxprod for EK-ED2-TP and APEKE12TPxx.knxprod for EK-E12-TP);

which can be downloaded from the ekinex website www.ekinex.com.

The application program allows the configuration of all working parameters for the device.

The device-specific application program has to be loaded into ETS or, as alternative, the whole ekinex®

product database can be loaded; at this point, all the instances of the selected device type can be added to

the project.

For every single device, ETS allows to set the operating parameters separately for each function as described

in detail in the following chapters.

The configuration can, and usually will, be performed completely offline; the actual transfer of the programmed

configuration to the device takes place in the commissioning phase.

Product code EAN No. of

channels

ETS application software

(## = release)

Communication

objects

(max no.)

Group

addresses

(max no.)

EK-ED2-TP 8 APEKED2TP##.knxprod 229 254

Product code EAN No. of

channels

ETS application software

(## = release)

Communication

objects

(max no.)

Group

addresses

(max no.)

EK-E12-TP 8 APEKE12TP##.knxprod 229 254

Configuration and commissioning of KNX devices require specialized skills; to acquire these

skills, you should attend training courses at a training centre certified by KNX.

For further information: www.knx.org.

5 Commissioning

After the device has been configured within the ETS project according to user requirements, the commissioning

of the device requires the following activities:

electrically connect the device, as described in the product datasheet, to the bus line on the final

network or through a purposely setup network for programming;

apply power to the bus;

switch the device operation to programming mode by pressing the programming pushbutton located

on the rear side of the housing. In this mode of operation, the programming LED is turned on steady;

upload the configuration (including the physical address) to the device with the ETS program.

At the end of the upload, the operation of the device automatically returns to normal mode; in this mode the

programming LED is turned off. Now the device is programmed and ready for use on the bus.

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6 Function description

After switching on the bus, which also acts as a power supply, the device becomes fully functional after a very

short time needed for reinitialization. A delay is programmable for the device to become active on the bus in

order to avoid a bus traffic overload during the first moments of start-up of the whole network.

In case of a bus power failure (voltage lower than 19 V for 1 s or more), the device becomes unreactive: before

the power supply becomes insufficient, the status is internally stored. The timing functions are not active,

neither are the programmed group addresses.

As soon as the bus voltage is restored, the device will resume operation in its previous state (which is saved

on power fail), unless different initialization settings are programmed.

6.1 Offline operation

A fully unprogrammed device does not operate in standby mode. Since the operation relies entirely on the

exchange of information through communication objects, there is no part of the device that can operate

independently from a KNX bus.

6.2 Online operation

In general the device works like a configurable digital sensor that is listening to own inputs or outputs of other

devices. On input events the device performs output functionality over KNX bus like sending values or

controlling external devices like KNX actuators.

Application manual




6.3 Software working cycle

The main purpose of the software is following:

Handle user pushbutton presses and generate bus telegrams according to the assigned functions;

Implement pushbutton interlock and timing functions;

Handle incoming bus messages in order to update the status of pushbutton activations and LED

indicators;

Respond to bus messages requesting feedback on the status of the inputs.

The status of the device and specifically of its entities (input activation status and LED indicators) relies on

KNX communication objects, which can be freely defined and bound in various ways to the physical elements

of the device; these communication objects acts as state variables for the device.

There are also special events on which it is possible to trigger additional features. These events are the bus

failure and recovery, and the download of a new configuration with ETS.

6.4 Pushbutton inputs

The press of a pushbutton can be bound to different effects on a state variable.

6.4.1 Pushbutton input events

A button press can be handled either as an “on-off” event (“on” means when the button is pushed, “off” when

it is released), or as a “short press - long press” event (whereby a time period can be defined to discriminate

the duration of the “long” from the “short” press).

In both cases, for each of the two available events a separate action can be assigned that operates on a

selected variable (actually, more than one; see below for details).

6.4.2 Lock function

For each input (or channel if inputs are coupled, see below), a lock feature can be enabled which allows to

block the operation of an input through a message on a communication object.

When in a locked state, the input is effectively disabled.

A value (for each transition) can be specified to be assigned to the communication object upon entering or

exiting the locked state.

The locked state can also be automatically activated when the bus is connected.

6.4.3 State variables (communication objects)

The variable that is changed by the input events can be one of the types available for KNX communication

objects, i.e. for instance a 1-bit value (on-off), a 2-bit value or an integer value of larger size.

In all cases, each of the two events can:

change the value of the variable to one of two definable values within its range (which is trivial in the

case of the 1-bit value);

toggle between the two defined values

do nothing (value is unaffected)

Application manual




This state variable, once assigned a group address, is actually a KNX communication object; as such, it

undergoes the usual rules for communication objects, among which – for instance – the effect of flags to

determine how the change of value affects the transmission of the objects.

6.4.4 Binding between Events and Communication objects

The above description is a little simplified in order to ease comprehension; as a matter of fact, to each event

can be assigned not just one, but several communication objects (up to 8), even of different types. Each of

these communication objects can have its own behaviour and its own associated value set.

6.4.5 Repeated send

For most features, is it possible to set the device to send a telegram not just when a value changes as a

consequence of an input transition, but also at regular intervals whenever that value setting is active.

This behaviour, also referred to as Cyclical Transmission, can be set separately for each of the two values that

are associated to an input (or both, or none of them).

If an input is set to “send values or sequences” mode, repeated send is not available if more than 1

Communication Object is assigned to that input.

6.4.6 Input coupling

The 8 pushbutton inputs described can be considered, and used, as independent; however, due to the physical

structure of the device and the nature of the functions it most frequently performs, these inputs can be naturally

grouped in pairs, which in the application program are referred to as channels. Each channel is made of a pair

of inputs, and is physically associated to a rocker.

Since the channels of the device are labelled 1 to 4, the inputs are labelled 1A / 1B for channel 1, 2A / 2B for

channel 2 and so on. The same numbering is used whether the channel pairing is used or not.

In order to specify channel pairings, each rocker can be configured in two ways: single mode and coupled

mode. This setting appears among rocker-level settings rather than input-level settings, because only inputs

belonging to the same rocker can be coupled. The only combinations allowed for coupling are in fact 1A with

1B, 2A with 2B, and so on.

In single or independent mode, each input operates independently, has its own parameters and

communication objects. This is the mode of operation described so far.

In coupled mode, 2 inputs operate logically grouped under a channel in order to perform a common

functionality; therefore, they operate on shared communication objects.

It is possible to configure some of the inputs in single or independent mode and the others in coupled mode,

with the pairing constraints just described.

It must be mentioned that there is actually a third way to configure an input pair, which lies somehow halfway

between the two modes above (although it is considered as a variation of the single mode): each second input,

i.e. inputs 1B, 2B, 3B etc., can be configured to perform exactly the same function as its first input. In this

fashion, both pushbuttons associated with a rocker are effectively operated “in parallel”, so as to operate the

whole rocker as a single, larger control (either pushbutton or switch, according to programmed operation).

Following there is a description of all possible features of the channels. Single or independent and coupled

modes have a similar functionality, but differ for the configuration and will be therefore be treated separately.

Application manual




6.4.7 Single or independent input mode

Each single input can be configured for one of following different features:

1. Send values or sequences

An event triggers the transmission on the bus of configurable values or sequence of values.

These values can be of a logical type or a numerical type with a different size.

A sequence of values can be made of up to 8 communication objects of different value types.

Time delays can set between values in the sequence.

2. Dimmer control

This mode is intended to be used with dimming actuators for the control of lighting devices.

The functionality is triggered on short press and long press events.

On short press events, the device sends on/off telegrams to the dimming actuator.

On long press events, the dimming percentage is varied up or down until the button is released.

3. Shutter or Venetian blind control

This mode is intended to be used together with actuators for the control of motorized blinds, shutters

and similar devices. These actuators have functions for blind opening and closing; two movement types

are selectable, i.e. continuous movement and stepwise movement. On input events, the device sends

operation telegrams to the actuators.

The operation is configurable through following parameters:

If toggle mode is enabled, on each activation of the same input the movement direction is

inverted; if it is disabled, the movement direction is fixed and it can be set to “up” or “down”.

If blinds mode is enabled, the device sends “full movement” telegrams on long press and “step”

telegrams on short press; if it is disabled, the device sends “full movement” telegrams on long

press and “stop” telegrams on short press.

4. Scene function output

This mode is intended to be used together with several KNX actuators that support using a scene

function; this function allows storing and recalling a communication object value on an actuator.

In this mode, the role of the device is to send a “store / recall scene” telegram to the actuator on a long

/ short press event.

This mode has two possible configurations:

Activate pre-set scene on short press, and store current setting as scene value on long press

Activate two different scenes on long and short press.

6.4.8 Coupled input mode

Each pair of coupled inputs, corresponding to the two sides of a same rocker, can be configured for one of

following different features (only the differences from the single mode are highlighted):

1. Switch control

Both inputs in a pair are bound to the same communication object; unlike single mode, the object can

only be of the 1-bit type (on-off), therefore building a conventional switching behaviour.

The user can configure which of the two inputs sets the “off” or resp. “on” value.

2. Dimmer control

The functionality is triggered on short press and long press events of the inputs in the pair.

The user can configure which of the two inputs sets the “up” or resp. “down” value.

On short press events, the input configured as “up” sends an “on” switching telegram to the dimming

actuator; while the “down” input sends an “off” telegram.

Application manual




On long press events, the dimming percentage is varied up or down until the button is released.

3. Shutter or Venetian blind control

The two inputs of a pair are assigned to opposite movement directions; these can be assigned to inputs

as desired, i.e. A up / B down or the other way around.

The blinds mode can also be set, and it works exactly as in single mode.

In coupled mode, there is no provision for a scene control feature.

Application manual




6.4.9 Dimming function

The dimming function is a device application profile included in KNX specifics. Those specifics define the basic

requirements for interface mechanisms, in addition to which some aspects regarding the operating modes,

peculiar for each device (for both command or actuation devices) are to be considered.

All the information contained in this section have the purpose of illustrating specific device

functions, and therefore are not to be necessarily considered exhaustive or applicable to

other cases. In order to obtain a complete or generally applicable documentation, please

refer to the official KNX documentation.

For further information, visit the website www.knx.org.

The dimmer control type is essentially based on a 4-bit communication object, whose data has the following

format:

The transmission of telegrams containing data of such format tells the actuator to perform an increase or a

decrease, by an amplitude equal to the specified step, or to stop an ongoing variation.

The increase or decrease of an intensity value by the actuator is not instantaneous but gradual; therefore, an

increase / decrease command with interval equal to the maximum allowed value has the effect of starting the

intensity variation in the desired direction, which will continue until the maximum (or minimum) value has been

reached. Such variation can be stopped, once the desired intensity value has been reached, by sending a

“stop” command.

It is normally possible, and desirable, to have the possibility to instantly switch on or off the load (i.e. to

instantaneously bring its value from 0% to 100%). In order to achieve that, an “On / Off” command based on

another object is used; this is the same object used for the normal load switch, which is present also in absence

of a dimming mechanism.

The command device – in this case, the rocker unit – will define the operations to generate a sequence of

commands with an opportune order and time interval, in order to achieve the desired command effect.

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In case of unit EK-Ex2-TP, the defined operations and related commands are the following:

Figure 3 - Dimmer mode command sequence

Short press: instantaneous switch on / off (toggle on / off on a switch object);

Long press: increase / decrease value until 100% / 0%;

Release: stop increase / decrease.

Please note that the same mechanism can be applied to the shutter or venetian blind control (in that case,

“maximum / minimum” is substituted with “open / close”). For this purpose, the data type (DPT) 3.008 exists,

whose structure and values are identical to those already described; in order to control a shutter with the

same mode, it is possible to connect a communication object type 3.007 command side, to an object type

3.008 actuator side (if foreseen). In this case, obviously, the object type “On / Off” which allows

instantaneous switch on / off is not used.

Application manual




6.4.10 Shutter / venetian blind function

The “Shutter / venetian blind” function is a bundle of application profiles included in KNX specifics. As for

dimming function, such specifics define basic requirements related to interface mechanisms, in addition to

which some aspects regarding the operating modes, peculiar for each device (for both command or actuation

devices) are to be considered.

All the information contained in this section have the purpose of illustrating specific device

functions, and therefore are not to be necessarily considered exhaustive or applicable to

other cases. In order to obtain a complete or generally applicable documentation, please

refer to the official KNX documentation.

For further information, visit the website www.knx.org.

In case of shutters, the actuator brings a mechanic component from one point to another in a gradual way, with

possibility to stop at intermediate points; the command is carried out by 2 lines which, when activated (one line

at a time) make the actuator move in the corresponding direction.

A venetian blind is essentially a shutter that, in addition to the up / down movement, is also equipped with slats

that can be opened / closed same way as a shutter (gradual movement between extreme points). The

peculiarity is that normally the slat’s movement and the up / down movement are controlled by the same two

lines; therefore, the activation of the electromechanic device must be carried out according to a specific

sequence. For further detail please check the actuator’s documentation; in this document all we need to point

out is that, command side, the control sequences can be considered as independent from these aspects.

The basic control for a shutter or a venetian blind is essentially based on three 1-bit communication objects:

[1.008] Move Up/Down

[1.007] Stop – Step Up/Down

[1.017] Dedicated Stop

The effect of the commands linked to these objects is the following:

The command “Move”, when received, starts the movement of the shutter in the indicated

direction.

The command “Stop – Step” has two functions: if the shutter is stopped, it moves by one step in

the indicated direction (the duration is set in the actuator), if not, it stops the ongoing movement

without doing anything else.

The command “Stop” just stops the ongoing movement.

In addition, other types of control objects are normally available (“dimmer” type, absolute position, etc.) but

they are not part of the basic control on which this manual is about; for further information please refer to the

actuators’ manual or KNX specifics.

In the simplest version, on command side:

In order to control a shutter at least the objects “Move” and “Stop” are required (and present).

In order to control a venetian blind at least the objects “Move” and “Stop – Step” are required (and

present).

On actuator side – whether it is a shutter or a venetian blind – the presence of objects “Move” and “Stop –

Step” must be guaranteed, while the presence of the object “Stop” is optional (but usually present).

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Application manual




As for the operations to perform on the command device, in our specific case the rocker unit, in order to

generate a sequence of these commands with the proper order and time interval, there are multiple

possibilities.

In case of ekinex input devices, two modes are available – indicated as “Shutter” and “Venetian blind” based

on their typical destination – which are illustrated in the following figure.

Figure 4 - “Shutter” mode command sequence

In “Shutter” mode, when a rocker is pressed – or a digital input is activated – the shutter starts moving in the

corresponding direction (which can be alternatively in the two directions if the rocker is in independent mode

and has been configured as toggle).

If the rocker is released quickly, the shutter will continue its run until full opening or closing; it is still possible to

stop it by pressing again the rocker with a long press.

If the rocker is pressed with a long press, when it is released – which will be in correspondence with the desired

position – the shutter will stop.

Application manual




Figure 5 - “Venetian blind” mode command sequence

In “Venetian blind” mode, on release of a rocker after a short press, the venetian blind performs a step; this

operation, normally – i.e. even if the actuator is indeed configured for a venetian blind – is used for the slats

regulation.

If the rocker is pressed with a long press, when the threshold time is reached, a “Move” command is issued,

which will bring the venetian blind to full open or close. In order to stop it at an intermediate position, the rocker

needs to be pressed again (short press).

Application manual




6.5 LED indicators

The LED indicators associated with each input are two (first colour and second colour) and can be singularly

addressed, even if the corresponding inputs are coupled.

6.5.1 General parameters

All LEDs have a common intensity value, which can be set from the bus through a communication object or

with a fixed setting from 0 to 100% in 10% steps.

6.5.2 Individual parameters

Each LED can be driven in one of following ways:

Fixed value (always on or always off);

Lit when the corresponding input is activated. In this option, an additional off-delay can be

specified after the button is released;

Status set from the bus through a communication object. In this case, the LED can be set to be

flashing when active (with a choice of different on/off time combinations), and the on/off light

status can be inverted with respect to the communication object status (so as to have the LED

on when the CO has an “off” value).

6.5.3 Technical Alarm indicator

The device has a peculiar indicator feature called Technical Alarm: if it is enabled, all LEDs at the four corners

of the device can be activated flashing through a KNX bus telegram. In particular, the activation of the technical

alarm generates the blue LEDs activation in BG version (colour of the LEDs: green and blue), while the red

LEDs activation in RW version (colour of the LEDs: red and white). For further information about the LEDs

position and configuration parameters please refer to the application section of this manual.

This feature is meant as an indicator for a generic alarm condition, but it can be used in a custom way as the

user sees fit.

The typical purpose of this indication is to warn about an alarm condition, but can be also used for any other

indication.

Application manual




6.6 Temperature sensor

The value from the embedded temperature sensor, unless it is disabled, can be read from the bus by other

devices. In addition, their behaviour can be modified through following parameters:

6.6.1 Temperature sensor

The raw value read from the sensor can be corrected with a small offset (-5 °C to +5 °C in steps of 0.5 °C), in

order to compensate for environmental factors and achieve a better precision.

The sensor value can periodically be sent on the bus with a specified transmission interval, and whenever a

specified variation occurs.

Application manual




6.7 Room thermostat

6.7.1 Use of sensors

The temperature controller integrated inside the pushbutton allows the room temperature acquisition in the

following ways:

1) from the temperature sensor integrated inside the device;

2) via bus from another KNX device, e.g. another ekinex® pushbutton

In order to optimize or correct the temperature regulation in particular cases (big rooms, when there is a strong

asymmetry in temperature distribution, when the pushbutton is installed in wrong or unsuitable positions, etc.)

the device can use a weighted mean between two temperature values. The weights are assigned according

to the Relative weight parameter, which assigns a proportion to the values.

Note on mounting position

If the integrated temperature regulator is used, the device must be preferably installed on an internal wall, at 1,5 m of height

and at least 0,3 m of distance from doors. The device cannot be installed near heat sources such as radiators or domestic

appliances or in positions subjected to direct solar irradiation. If necessary, for the regulation can be used a weighted mean

value between the measured temperature acquired by the integrated sensor and a value received via bus from another

KNX device.

6.7.2 Applications

The applications that can be configured are peculiar to thermal plants with a single stage and concern the

following terminals: radiators, electric radiators and radiant panel systems.

The temperature control can be:

two point control with hysteresis, ON-OFF command type;

proportional-integral, with ON-OFF command, PWM or continuous type.

6.7.3 Control algorithms

The picture below shows the components of a common generic control system for ambient temperature. The

room thermostat measures the actual temperature of the air mass (Teff) and constantly compares it to the

setpoint value (Tset).

i

Teff

Appliance

Solar radiation Presence of people

Control algorithm

Actuator (e.g. relay output –

valve motor etc)

Heating body (e.g. radiator, fan-

coil, radiant panel)

Ambient Tset +

-

Room thermostat Actuator control

Dispersioni

Application manual




The control algorithm, basing on the difference between Tset and Teff, processes a command value which can

be analogue or On / Off type; the command is represented by a CO that is transmitted via bus, periodically or

event based, to a KNX actuator device.

The output of the actuator device is the driving variable of the control system, which can be e.g. a flow rate of

water or air. The control system realized by the room thermostat is of feedback type, namely the algorithm

takes into account the effects on the system in order to change the control action on the same entity.

6.7.3.1 Two-point control with hysteresis

This control algorithm, which is also known as On / Off, is the most classic and popular. The control provides

for the on / off switching of the system following a hysteresis loop, i.e. two threshold levels are considered for

the switching instead of a single one.

Heating mode: when the measured temperature is lower than the value of the difference (Tset – ΔThysteresis),

whereby ΔThysteresis identifies the differential adjustment of the boilers, the device activates the heating system

by sending a message or KNX telegram to the actuator that handles the heating system; when the measured

temperature reaches the desired temperature (Setpoint), the device disables the heating system by sending

another message. In this way, there are two decision thresholds for activation and deactivation of the heating,

the first being the level (Tset – ΔThysteresis) below which the device activates the system, whereas the second is

the desired temperature above which the heating system is deactivated.

Cooling mode: When the measured temperature is higher than the value of the difference (Tset + ΔThysteresis),

whereby ΔThysteresis identifies the differential adjustment of the cooler, the device activates the air conditioning

system by sending a message or KNX telegram to the actuator that handles it; when the measured temperature

falls below the desired temperature Tset the device turns off the air conditioning system by sending another

message. In this way, there are two decision thresholds for activation and deactivation of the cooling: the first

being the level (Tset + ΔThysteresis) above which the device activates the system, whereas the second is the

desired temperature below which the air conditioning system is deactivated. In the ETS application program,

two different parameters are available for the hysteresis value for both heating and cooling: the values usually

differ depending on the system type and its inertia.

In those applications where floor or ceiling radiant panels are present, it is possible to realize a different 2-point

room temperature control. This type of control must be paired either to a proper regulation system for flow

temperature that takes into account all internal conditions or an optimizer that exploits the thermal capacity of

the building to adjust the energy contributions. In this type of control the hysteresis (ΔThysteresis) o the room

temperature high limit (Tset + ΔThysteresis) represent the maximum level of deviation that the user is willing to

accept during plant conduction.

T ambient OFF

ON

Tset

Thysteresis

T ambient OFF

ON

Tset

Thysteresis

Application manual




Heating mode – When the measured temperature is lower than the desired temperature Tset, the device

activates the heating system by sending a message or KNX telegram to the actuator that handles it; when the

measured temperature reaches the value (Tset + ΔThysteresis), whereby ΔThysteresis identifies the differential

adjustment of the boilers the device disables the heating system by sending another message. In this way,

there are two decision thresholds for activation and deactivation of the heating, the first being the desired

temperature Tset below which the device activates the system, whereas the second is the value (Tset +

ΔThysteresis), above which the heating system is deactivated.

Cooling mode – When the measured temperature is higher than the desired temperature Tset, the device

activates the air conditioning system by sending a message or KNX telegram to the actuator that handles it;

when the measured temperature reaches the value (Tset - ΔThysteresis), whereby ΔThysteresis identifies the

differential adjustment of the air conditioning system, the device disables the air conditioning system by

sending another message. In this way, there are two decision thresholds for activation and deactivation of the

air conditioning system: he first being the desired temperature Tset above which the device activates the

system, whereas the second is the value (Tset - ΔThysteresis) below which the air conditioning system is

deactivated.

In the ETS application program, two different parameters are available for the hysteresis value for both heating

and cooling: the values usually differ depending on the system type and its inertia.

In the ETS application program, the default 2-point hysteresis control algorithm foresees inferior hysteresis for

heating and superior for cooling. If Heating and/or cooling type = floor radiant panels or ceiling radiant panels,

it is possible to select the hysteresis position according to the described second mode, i.e. with superior

hysteresis for heating and inferior for cooling.

The desired temperature (Tset) is generally different for each one of the 4 operating modes and for

heating/cooling modes. The different values are defined for the first time during ETS configuration and can be

modified later on. In order to optimize energy saving (for each extra degree of room temperature, outbound

dispersions and energy consumption go up 6%), it is possible to take advantage of the multi-functionality of

the domotic system, for example with:

• Hour programming with automatic commutation of the operating mode by means of KNX supervisor;

• Automatic commutation of the operating mode according to presence of people in the room;

• Automatic commutation of the operating mode according to window opening for air refreshment;

• Circuit deactivation when desired temperature is reached;

• Flow temperature reduction in case of partial load.

6.7.3.2 Continuous Proportional-Integral control

The continuous proportional-integral (PI) controller is described by the following equation:

𝑐𝑜𝑛𝑡𝑟𝑜𝑙 𝑣𝑎𝑟𝑖𝑎𝑏𝑙𝑒(𝑡) = 𝐾𝑝 × 𝑒𝑟𝑟𝑜𝑟(𝑡) + 𝐾𝑖 × ∫ 𝑒𝑟𝑟𝑜𝑟(𝜏)𝑑𝜏𝑡

0

T ambient OFF

ON

Tset

hysteresis

T ambient OFF

ON

Tset

Thysteresis

Application manual




whereby:

𝑒𝑟𝑟𝑜𝑟(𝑡) = (𝑆𝑒𝑡𝑝𝑜𝑖𝑛𝑡 − 𝑀𝑒𝑎𝑠𝑢𝑟𝑒𝑑 𝑡𝑒𝑚𝑝𝑒𝑟𝑎𝑡𝑢𝑟𝑒) 𝑖𝑛 ℎ𝑒𝑎𝑡𝑖𝑛𝑔

𝑒𝑟𝑟𝑜𝑟(𝑡) = (𝑀𝑒𝑎𝑠𝑢𝑟𝑒𝑑 𝑡𝑒𝑚𝑝𝑒𝑟𝑎𝑡𝑢𝑟𝑒 − 𝑆𝑒𝑡𝑝𝑜𝑖𝑛𝑡) 𝑖𝑛 𝑐𝑜𝑜𝑙𝑖𝑛𝑔

𝐾𝑝 = 𝑝𝑟𝑜𝑝𝑜𝑟𝑡𝑖𝑜𝑛𝑎𝑙 𝑐𝑜𝑛𝑠𝑡𝑎𝑛𝑡

𝐾𝑖 = 𝑖𝑛𝑡𝑔𝑟𝑎𝑙 𝑐𝑜𝑛𝑠𝑡𝑎𝑛𝑡

The control variable is composed by 2 numbers, one depending proportionally from the error and one

depending from the integral of the error itself.

Practically, some more intuitive values are used:

𝑃𝑟𝑜𝑝𝑜𝑟𝑡𝑖𝑜𝑛𝑎𝑙 𝐵𝑎𝑛𝑑 𝐵𝑃 [𝐾] = 100

𝐾𝑝

𝐼𝑛𝑡𝑒𝑔𝑟𝑎𝑙 𝑇𝑖𝑚𝑒 𝑇𝑖 [𝑚𝑖𝑛] =𝐾𝑝

𝐾𝑖

The Proportional Band is the error value that determines the maximum span of the control variable at 100%.

For example, a controller with Proportional Band = 5 K regulates at 100% when Setpoint = 20°C and Measured Temperature is ≤

15 °C in heating mode; in cooling mode, it regulates at 100% when Setpoint = 24°C and Measured Temperature is ≥ 29°C. As shown

in figure, a controller with a narrow Proportional Band provides higher control variable values for smaller errors compared to a

controller with a wider Proportional Band.

Integral Time is the amount of time necessary to repeat the value of the control variable of a purely proportional controller,

when error is constant. For example, with a purely proportional controller with Proportional Band = 4 K, if Setpoint = 20°C and

Measured Temperature = 18°C, the control variable will be 50%. If Integral Time = 60 minutes, if error remains constant, the control

variable will be 100% after 1 hour, i.e. the controller will add to the control variable a contribution equal to the value due to its

proportional part.

0%

100%

T ambiente [°C] T Setpoint

Narrow Proportional Band

50%

Wide Proportional Band

0%

100%

50%

Narrow Proportional Band

Wide Proportional Band

Application manual




In heating and air conditioning systems, a purely proportional controller cannot guarantee reaching the Setpoint. An integral action is

mandatory in order to reach the Setpoint: for this reason, the integral action is also called automatic reset.

6.7.3.3 PWM Proportional-Integral control

The proportional-integral PWM (Pulse Width Modulator) controller uses an analogue control variable to

modulate the duration of the time intervals in which a binary output is in the On or Off state. The controller

operates in a periodic manner over a cycle, and in each period it maintains the output to the On value for a

time proportional to the value of the control variable. As shown in the figure, by varying the ratio between the

ON time and the OFF time, the average time of activation of the output varies, and consequently the average

intake of heating or cooling power supplied to the environment.

This type of controller is well suited for use with On / Off type actuators, such as relays and actuators for zone

valves, which are less expensive (both for electrical and mechanical components) than proportional actuators.

A distinctive advantage of this type of controller, compared with the raw On / Off controller already described,

is that it eliminates the inertia characteristics of the system: it allows significant energy savings, because you

avoid unnecessary interventions on the system introduced by the 2-point control with hysteresis and it only

provides the power required to compensate for losses in the building.

Every time the user or the supervisor changes the desired temperature setpoint, the cycle time is interrupted,

the control output is reprocessed and the PWM restarts with a new cycle: this allows the system to reach its

steady state more quickly.

Terminal type Proportional Band [K] Integral Time [min] Cycle Period [min]

Radiators 5 150 15-20

Electrical heaters 4 100 15-20

Fan-coil 4 90 15-20

Floor radiant panels 5 240 15-20

Guidelines for choosing the proper parameters of a PMW Proportional-Integral controller:

OFF

ON Cycle period

T ON

T OFF

Time [min]

OFF

ON T ON = T OFF

Time [min]

Mean ON time = 50%

OFF

ON T ON = ½ T OFF

Time [min]

Mean ON time = 25%

Application manual




Cycle time: for low-inertial systems such as heating and air conditioning systems, short cycle times must be chosen (10-15 minutes)

to avoid oscillations of the room temperature.

Narrow proportional band: wide and continuous oscillations of the room temperature, short setpoint settling time.

Wide proportional band: small or no oscillations of the room temperature, long setpoint settling time.

Short integral time: short setpoint settling time, continuous oscillations of the room temperature.

Long integral time: long setpoint settling time, no oscillations of the room temperature.

6.7.4 Setpoint management

The pushbutton is not equipped with any local interface to control the integrated room thermostat, therefore

the temperature setpoint modifications need to be managed through communication objects coming from a

supervisory device.

Five setpoint management modes are foreseen:

Single setpoint

Relative setpoints, heating/cooling switch over from bus

Relative setpoints, automatic heating/cooling switch over

Absolute setpoints, heating/cooling switch over from bus

Absolute setpoints, automatic heating/cooling switch over

Single setpoint mode

In this mode, a unique communication object is exposed (Input Setpoint) to modify the desired temperature.

This object can be updated cyclically or on event of change by the supervisory device. If power goes down,

the last value is retained into the pushbutton’s non-volatile memory. In case the object is not updated, the

temperature controller acts anyway on default setpoints (both heating and cooling) set in the application

program during commissioning.

If a temperature controller is set on both heating and cooling mode, it is necessary that the

supervisory device also updates the input seasonal mode object (Heating/cooling status in, [1.100]

DPT_Heat_Cool) in order to coherently switch over the controller’s action.

If window contacts for energy saving are used, when detecting an open window the input setpoint freezes and

the pre-set building protection setpoint is activated (the relative communication object is exposed and is

different in heating or cooling mode).

Relative setpoints, heating/cooling switch over from bus

In this mode, 4 communication objects are exposed, one for each operating mode:

Comfort setpoint

Stand-by offset

Economy offset

Building protection setpoint

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Application manual




Stand-by and economy setpoints are represented as attenuations to the comfort setpoint in order to facilitate

the supervisor management: by uniquely modifying the comfort setpoint, references for attenuated modes are

automatically transferred. The values modified from bus are retained in the pushbutton’s non-volatile memory.

With this mode, the supervisory device can develop an hour-based time scheduling by sending to the

pushbutton the current operating mode (comm. obj. HVAC mode in [20.102] DPT_HVACMode). The default

value for HVAC mode in corresponds to the comfort setpoint value.

Same as single setpoint management, if the temperature controller is set as both heating and cooling mode,

it is necessary that the supervisory device also updates the input seasonal mode object (Heating/cooling status

in, [1.100] DPT_Heat_Cool) in order to coherently switch over the controller’s action.

Relative setpoints, automatic heating/cooling switch over

In this mode, 3 communication objects are exposed, for all operating modes:

Comfort heating setpoint

Building protection heating setpoint

Building protection cooling setpoint

Stand-by and economy setpoints are represented as attenuations to the comfort setpoint and can only be

modified in the application program during commissioning: by uniquely modifying the comfort setpoint,

references for attenuated modes and for comfort cooling setpoint mode (through switch over dead band) are

automatically transferred. The values modified from bus are retained in the pushbutton’s non-volatile memory.

With this mode, the supervisory device can develop an hour-based time scheduling by sending to the

pushbutton the current operating mode (comm. obj. HVAC mode in [20.102] DPT_HVACMode). The default

value for HVAC mode in corresponds to the comfort setpoint value.

The switch over between operating modes is automatic and the information can be sent to other devices

through communication object Heating/cooling status out, [1.100] DPT_Heat_Cool). Please refer to the

section about heating/cooling switch over to learn more about switch over modes.

6.7.5 Operating modes

In Single Setpoint mode, 2 levels for each operating mode are available:

Temperature setpoint

Building protection setpoint

Time scheduling for attenuation can be realized by the supervisor, by directly modifying the temperature

setpoint.

In Relative Setpoint mode, 4 different operating modes are available, which are mutually exclusive to one

another:

comfort;

stand-by;

economy;

building protection.

Through ETS application program, it is possible to assign 2 different setpoint values to each operating mode,

for comfort and building protection level, and two different attenuation levels for stand-by and economy,

Application manual




corresponding to both heating and cooling. Stand-by and economy setpoints are represented as attenuations

to the comfort setpoint in order to facilitate the supervisor management: by uniquely modifying the comfort

setpoint, references for attenuated modes are automatically transferred.

Each setpoint, except when automatic heating/cooling switch over is active, is exposed through communication

objects. Setpoints and attenuations can be modified remotely through the exposed communication objects.

The building protection setpoint intervention must be planned in ETS application program, as these parameters

concern the safety and protection of the plant’s components (especially during heating).

6.7.6 Heating/cooling switch over

The switch over between both heating and cooling mode can take place in 2 ways:

1. from KNX bus, through a communication object;

2. automatically, through a command from the internal logic of the device;

Switchover from bus

In mode 1, the switch over command is issued through KNX bus and therefore it is performed by a different

KNX device, e.g. the ekinex® Touch&See unit. The integrated temperature controller acts as a “slave”: the

switch over is carried out by input communication object [DPT 1.100 heat/cool].

Automatic switch over

Mode 2 is suitable for applications with heating / cooling systems with a 4-pipe configuration (e.g. fan-coils or

radiant ceiling panels). Also in this case the information can be transmitted on the bus through an output

communication object [DPT 1.100 heat/cool]; the difference with mode 1 is that the switch over is performed

automatically by the machine, basing on the values of current temperature and setpoint. The automatic switch

over is achieved by introducing a dead band as shown in the following figure.

The figure shows that, as long as the actual measured temperature is below the heating mode setpoint, the

heating mode is selected; similarly, if the value is greater than the cooling setpoint, then cooling mode is

Application manual




selected. If the value is within the dead band, the operation mode remains unchanged until the value itself

passes over the threshold value associated with the opposite mode.

The 4 setpoints for heating mode and the 4 setpoints for cooling mode are not exposed through

communication objects to avoid inconsistencies between the different levels of temperature. In this

case, a single communication object is published, which corresponds to the comfort heating

setpoint. Every time this parameter is changed, the whole dead band changes with it, as well as all

setpoints related to the 4 operating modes: the automatic switch over is then triggered outside the

defined dead band.

6.7.7 Window switch management

Window switch management is an optional feature, oriented to energy saving, which becomes available only

if the Temperature control function is enabled in the application program.

Whenever a condition of opened window is detected, the operating mode is forced to “building protection” and

it remains forced as long as the open window condition is active. The program provides a time delay parameter

for detection, in order to discriminate between an occasional short-term opening (e.g. to provide air exchange

in the room) from an unintentional opening that justifies the power-saving function to be recalled.

The operating mode determined from Window switch management has priority on all operating mode settings

imposed by the scheduler (in case Setpoint management = relative setpoint)

The physical detection of window openings is normally performed through switches that can be connected to

KNX input devices; the pushbutton exposes up to 2 1-bit communication objects (Temperature control tab

External sensors) which can be synchronized to the switches’ states.

The internal logic performs a logical OR operation of the acquired contacts: the energy saving function is

therefore activated if at least one window switch activation is detected. In order to determine the physical state

of the contact corresponding to the “open window” state, two different options can be selected:

NC (normally closed): open contact stands for closed window, closed contact stands for open window;

NO (normally open): open contact stands for open window, closed contact stands for closed window;

6.7.8 Valve protection function

The function is suitable for both heating and cooling systems that use water as thermal conveying fluid and

are provided with motorized valves for the interception of a zone or of a single room. Long periods of inactivity

of the system can lead to the blockage of valves: to prevent this, the room temperature controller may

periodically send a command to open / close the valve in the period of inactivity of the system. This possibility

is further defined by the frequency and duration of the valve control.

6.7.9 Temperature control alarm

The integrated temperature controller can stop the internal control algorithm for one of the following reasons:

For an external event, which can be configured and linked to the Thermal generator lock

communication object;

For an internal temperature sensor’s fault (measured room temperature too low while NTC resistance

value is too high or vice versa);

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Application manual




For a timeout (data not updated by the bus) when a weighted mean between the internal sensor’s

value and an auxiliary external sensor’s value is used.

When one of these events occur, the internal controller stops the control algorithm and the command output is

taken to complete closing position (OFF or 0%): this state is signalled through the communication object

Temperature control alarm.

Application manual




6.8 Logic functions

The KNX pushbutton allows to use some useful logic functions (AND, OR, NOT and exclusive OR) in order

to implement complex functions in the building automation system.

You can configure:

8 channels of logical functions

4 inputs for each channel

Each object value, if desired, can be individually inverted by inserting a NOT logic operator.

The inputs created by the objects are then logically combined as shown in the following figure:

Figure 6 – Logic combination function

The logic block on the right side of the figure has the following function, based on the selected operation:

OR – the output is ON if at least one input is ON;

AND – the output is ON if all inputs are ON;

XOR – the output is ON if an odd number of inputs is ON;

This last function is more intuitive when there are only 2 inputs: in this case, the output is ON when one input

or the other one is ON, but not the two of them simultaneously.

Please note that in this description, with “input” and “output” we refer only to the logic block; for the device

operation, the effective “inputs” are given by communication objects, so also the possible activation of NOT

logic operators has to be considered.

Application manual




The following figures show the basic logic functions, assuming 2 inputs and only one logic communication

object:

Figure 7 – Logic function OR

Figure 8 – Logic function AND

Application manual




Figure 9 – Logic function Exclusive OR (XOR)

For each channel, a parameter Delay after bus voltage recovery is available: this parameter represents the

time interval between the bus voltage recovery and the first reading of the input communication objects for

evaluating the logic functions.

The communication function representing the logic function output is sent on the bus on event of change;

alternatively, a cyclic sending can be set.

Application manual




7 Application program for ETS

In the following chapters, there is the list of folder, parameters and communication objects of the application

program.

Every channel, and every input or input pair under a channel, offers the same set of communication objects

and parameters, but they may all be independently configured.

Hereafter, all channel-specific settings are listed grouped by channel; a generic channel number is referenced

as “x” (where x = 1…4), while a generic input is referenced as “xx” (xx = 1A, 1B, 2A, ... 4B).

The parameter values highlighted in bold represent the default value.

The device settings are divided in two main groups: the general settings and the channel-specific settings. The

settings are grouped in folders. The following figure shows the tree structure of the application program, with

the main folders:

Info su EK-EX2-TP

Generale

Sensore di temperatura

Sensori interni

Configurazione tasti

Oggetto 1

Funzione A

Oggetto 1

Funzione B

Tasto 1

....

Tasto 4

LED

Impostazioni

Sensori dal bus

Valore temperatura pesata

Riscaldamento

Raffreddamento

Controllo temperatura

Funzioni logiche

i

Application manual




In order to use the device as a temperature sensor or as a room temperature controller it is sufficient to enable

the temperature sensor in the Internal sensors folder. Consequently, also the Temperature control folder is

activated: therefore, it is possible to select an auxiliary temperature sensor to perform a weighted mean with

the main sensor and it is possible to configure the controller’s options for room temperature.

7.1 About EK-ED2-TP and EK-E12-TP

The folder About EK-ED2-TP is for information purposes only and does not contain parameters to be set. The

information given is:

© Copyright SBS S.p.A. 2017

Application software for ETS4

Version 2.00 (or later)

2-4 rockers pushbutton

SBS S.p.A.

Via Circonvallazione s/n

I-28010 Miasino (NO) Italy

www.ekinex.com

[email protected]

The folder About EK-E12-TP is for information purposes only and does not contain parameters to be set. The

information given is:

© Copyright SBS S.p.A. 2017

Application software for ETS4

Version 3.00 (or later)

KNX pushbutton series 71

SBS S.p.A.

Via Circonvallazione s/n

I-28010 Miasino (NO) Italy

www.ekinex.com

[email protected]

mailto:[email protected]

Application manual




7.2 General settings

The parameters in this section define the overall behaviour of the device, including the setting that defines

which and how many channels are available.

Parameter name Conditions Values

Rockers configuration See Fig. 9 and 10

for available options

Specifies the configuration of installed rocker plates, thereby determining how physical

pushbuttons will be associated to logical inputs and coupled in rocker pairs.

Leds intensity from bus - yes / no

Specifies whether the intensity value of LEDs should be set through a communication object.

Leds intensity Leds intensity from bus = no 0%..100% (50%)

Fixed intensity value of LEDs.

Delay after bus voltage recovery - hh:mm:ss.fff

(00:00:04.000)

Delay before bus telegrams can be sent after a recovery of the bus voltage. The delay time

affects the transmission generated by an event as well as the cyclical transmission. For the

cyclical transmission: after the delay time finished, the cycle restarts and the first telegram will

be sent after the cycle time.

Technical alarm - enabled / disabled

Enables a communication objects that activates an alarm indication through a bus telegram. The

indication is made by flashing the four LEDs at the corners of the device.

This indication is made available to the user for any purpose he sees fit (not necessarily an

actual alarm).

Room temperature controller enabled / disabled

Enables the folder containing the parameters for room temperature control.

Logic functions enabled / disabled

Enables the folders to configure AND, OR e XOR logic functions and their relative input and

output communication objects.

Object name Conditions Size Flags DPT No. Comm

Documents

EK-ED2-TP EK-E12-TP · 2020. 12. 4. · For final use, this unit must be completed with frontal plates for commands and a frame, which must be ordered ... EK-E12-TP-RW (red-white